Solve.From a 20-inch by 20-inch piece of metal, squares are cut out of the four corners so that the sides can then be folded up to make a box. Let x represent the length of the sides of the squares, in inches, that are cut out. Express the volume of the box as a function of x.
A. V(x) = 2x3 - 60x2
B. V(x) = 2x3 - 60x2 + 20x
C. V(x) = 4x3 - 80x2
D. V(x) = 4x3 - 80x2 + 400x
Answer: D
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Solve the problem.In how many distinguishable ways can the letters of the word TENNESSEE be arranged?
A. 81 B. 3780 C. 362,880 D. 7560
Simplify the expression. Assume that all variables are positive when they appear.
A. 
B. 
C. 
D. 
Solve the equation.5(9r - 1) = 5
A. 
B. 
C. 
D. 
Solve the problem.Softee Blankets charges $5 for shipping orders of $20 or less, $10 for orders from $20.01 to $70, and $15 for orders over $70. One week shipping charges for 500 orders totaled $4850. There were 30 more orders for $20 or less shipped than there were orders for over $70. Find the number of orders shipped at each rate.
A. $20 or less: 270; $20.01 to $70: 110; over $70: 120 B. $20 or less: 150; $20.01 to $70: 230; over $70: 120 C. $20 or less: 230; $20.01 to $70: 150; over $70: 120 D. The numbers cannot be determined from the given information.